White Tongue?

I noticed that my hatchling has a pale/white tongue, he is relatively active and I bathe him everyday. I feed him a mix of weeds (not dandelions in case you were thinking that's what the white came from) and spring mix. I also sprinkle calcium on the food everyday.
What could this mean?

If it's white as in just pale, it could be pretty normal for a tiny one. Dandelion is fine and will cause a black tongue but not a white one and not permanent. By spring mix, do you mean cabbage etc, as that's not good and will stop the uptake of calcium. Rather than just feed calcium, I would give him a decent supplement containing D3, such as Nekton MSA to balance things out for him.

Also, he's spending an awful lot of time under his basking light, usually sleeping. The basking spot is around 95 degrees and the colder part of the enclosure is around 70. I understand that hatchlings sleep a lot but it can be really depleting for them sleeping under the basking light most of the day. What could be the reason he's doing this?

Sleeping for any length of time under the basking light is dangerous and could dehydrate him seriously. How are you taking the temps? You need to take it with a probe thermometer or a laser beam for accuracy. Could be your temps are too low which would account for excessive basking.

If the thermometer is enclosed in glass or plastic it will overheat if put under a lamp as heat is trapped in the enclosed space, so giving a false reading. Please don't emphasise cheap, as taking short cuts usually results in problems. Look on eBay for a laser type thermometer, probably not much more expensive than the zoomed one, which is no good for placing under a lamp.

I've been fiddling with the lamp and thermometer and concluded that Cozmo wasn't getting enough heat, thus acting sluggish and sleeping a lot. I live in Canada and the weather was finally nice, so I took Him outside. After about 5 minutes there was already a noticeable difference. He surprised me with how active he was!

I put him back in his enclosure and he started getting sluggish again. So I've adjusted the basking light and he is now very active and happy:)